In a spatially dispersive medium, the electric dipole moment of an inclusion cannot be related to the macroscopic electric field through a local relation. Several recent works have emphasized the… (More)

In this paper, a nonlocal homogenization model is proposed for the analysis of the spectrum of natural modes on sub-wavelength mushroom-type high-impedance surfaces composed of a capacitive grid… (More)

Electromagnetic waves in an artificial medium formed by two mutually orthogonal lattices of thin ideally conducting straight wires (referred to as a two-dimensional wire medium) are considered. An… (More)

We discuss various possibilities to design phase shifters with reduced frequency dispersion using combined sections of forward-wave and backward-wave transmission lines. It is shown that inclusion of… (More)

All material supplied via Aaltodoc is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted,… (More)

Application of wire media for reduction of a mutual coupling of radiating elements is considered. We present a design, which allows for simultaneous decoupling for TM and TE polarizations. We show… (More)

We discuss antenna miniaturization using new metamaterials, combining advantages of artificial dielectric and natural magnetic materials. It is known that the reduction of an antenna size using… (More)

This contribution investigates artificial surfaces based on arrays of impedance loaded wires in the proximity of a ground plane. It is found that for specific loads it is possible to realize high… (More)

We present a general dyadic vector circuit formalism, applicable for uniaxial magneto-dielectric slabs, with strong spatial dispersion explicitly taken into account. This formalism extends the vector… (More)